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Code Issues Releases Activity

Remove some debugging code.

Browse Source 
Do a much better job of DWIM with partial device specifications.
Fix the module metadata build process, which was completely broken.
Use a larger read buffer when copying large objects in; this
improves performance marginally and will avoid flushning any small caches
we might choose to implement.
This commit is contained in:
Mike Smith 1998-10-09 07:11:19 +00:00
parent 6ba0dd2cfc
commit cab57be9ae
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=40107
6 changed files with 187 additions and 104 deletions
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6
sys/boot/i386/libi386/aout_freebsd.c
View File

@ -23,7 +23,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: aout_freebsd.c,v 1.8 1998/10/02 16:32:45 msmith Exp $
* $Id: aout_freebsd.c,v 1.9 1998/10/02 20:53:16 msmith Exp $
*/
#include <sys/param.h>
@ -72,10 +72,6 @@ aout_exec(struct loaded_module *mp)
bi->bi_symtab = mp->m_addr + ehdr->a_text + ehdr->a_data + ehdr->a_bss;
bi->bi_esymtab = bi->bi_symtab + sizeof(ehdr->a_syms) + ehdr->a_syms;
#ifdef DEBUG
printf("Start @ 0x%lx ...\n", entry);
#endif
__exec((void *)entry, boothowto, bootdev, 0, 0, 0, bootinfop);
panic("exec returned");

157
sys/boot/i386/libi386/biosdisk.c
View File

@ -23,7 +23,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: biosdisk.c,v 1.10 1998/10/04 09:12:15 msmith Exp $
* $Id: biosdisk.c,v 1.11 1998/10/06 07:27:05 msmith Exp $
*/
/*
@ -63,7 +63,6 @@
# define DEBUG(fmt, args...)
#endif
struct open_disk {
int od_dkunit; /* disk unit number */
int od_unit; /* BIOS unit number */
@ -117,6 +116,7 @@ struct devsw biosdisk = {
static int bd_opendisk(struct open_disk **odp, struct i386_devdesc *dev);
static void bd_closedisk(struct open_disk *od);
static int bd_bestslice(struct dos_partition *dptr);
/*
* Translate between BIOS device numbers and our private unit numbers.
@ -234,6 +234,7 @@ bd_opendisk(struct open_disk **odp, struct i386_devdesc *dev)
int sector, slice, i;
int error;
u_char buf[BUFSIZE];
daddr_t pref_slice[4];
if (dev->d_kind.biosdisk.unit >= nbdinfo) {
DEBUG("attempt to open nonexistent disk");
@ -295,36 +296,34 @@ bd_opendisk(struct open_disk **odp, struct i386_devdesc *dev)
dptr = &od->od_parttab[0];
od->od_flags |= BD_PARTTABOK;
/*
* XXX No support here for 'extended' slices
*/
if (dev->d_kind.biosdisk.slice < 1) {
/*
* Looking for an unsliced disk, check for the historically
* bogus MBR.
*/
if ((dptr[3].dp_typ != DOSPTYP_386BSD) ||
(dptr[3].dp_start != 0) ||
(dptr[3].dp_size != 50000)) {
error = ENOENT;
goto out;
}
sector = 0;
DEBUG("disk is dedicated");
/* Try to auto-detect the best slice; this should always give a slice number */
if (dev->d_kind.biosdisk.slice < 1)
dev->d_kind.biosdisk.slice = bd_bestslice(dptr);
} else {
/*
* Accept the supplied slice number unequivocally (we may be looking
* for a DOS partition) if we can handle it.
*/
if (dev->d_kind.biosdisk.slice > NDOSPART) {
error = ENOENT;
goto out;
}
dptr += (dev->d_kind.biosdisk.slice - 1); /* we number 1-4, offsets are 0-3 */
sector = dptr->dp_start;
DEBUG("slice entry %d at %d, %d sectors", dev->d_kind.biosdisk.slice - 1, sector, dptr->dp_size);
switch (dev->d_kind.biosdisk.slice) {
case -1:
error = ENOENT;
goto out;
case 0:
goto unsliced;
default:
break;
}
/*
* Accept the supplied slice number unequivocally (we may be looking
* at a DOS partition).
*/
dptr += (dev->d_kind.biosdisk.slice - 1); /* we number 1-4, offsets are 0-3 */
sector = dptr->dp_start;
DEBUG("slice entry %d at %d, %d sectors", dev->d_kind.biosdisk.slice - 1, sector, dptr->dp_size);
/*
* If we are looking at a BSD slice, and the partition is < 0, assume the 'a' partition
*/
if ((dptr->dp_typ == DOSPTYP_386BSD) && (dev->d_kind.biosdisk.partition < 0))
dev->d_kind.biosdisk.partition = 0;
unsliced:
/*
* Now we have the slice offset, look for the partition in the disklabel if we have
@ -378,6 +377,73 @@ bd_opendisk(struct open_disk **odp, struct i386_devdesc *dev)
}
/*
* Search for a slice with the following preferences:
*
* 1: Active FreeBSD slice
* 2: Non-active FreeBSD slice
* 3: Active FAT/FAT32 slice
* 4: non-active FAT/FAT32 slice
*/
#define PREF_FBSD_ACT 0
#define PREF_FBSD 1
#define PREF_DOS_ACT 2
#define PREF_DOS 3
#define PREF_NONE 4
static int
bd_bestslice(struct dos_partition *dptr)
{
int i;
int preflevel, pref;
/*
* Check for the historically bogus MBR found on true dedicated disks
*/
if ((dptr[3].dp_typ == DOSPTYP_386BSD) &&
(dptr[3].dp_start == 0) &&
(dptr[3].dp_size == 50000))
return(0);
preflevel = PREF_NONE;
pref = -1;
/*
* XXX No support here for 'extended' slices
*/
for (i = 0; i < NDOSPART; i++) {
switch(dptr[i].dp_typ) {
case DOSPTYP_386BSD: /* FreeBSD */
if ((dptr[i].dp_flag & 0x80) && (preflevel > PREF_FBSD_ACT)) {
pref = i;
preflevel = PREF_FBSD_ACT;
} else if (preflevel > PREF_FBSD) {
pref = i;
preflevel = PREF_FBSD;
}
break;
case 0x04: /* DOS/Windows */
case 0x06:
case 0x0b:
case 0x0c:
case 0x0e:
case 0x63:
if ((dptr[i].dp_flag & 0x80) && (preflevel > PREF_DOS_ACT)) {
pref = i;
preflevel = PREF_DOS_ACT;
} else if (preflevel > PREF_DOS) {
pref = i;
preflevel = PREF_DOS;
}
break;
}
}
return(pref + 1); /* slices numbered 1-4 */
}
static int
bd_close(struct open_file *f)
{
@ -576,8 +642,10 @@ bd_getdev(struct i386_devdesc *dev)
struct open_disk *od;
int biosdev;
int major;
int rootdev;
biosdev = bd_unit2bios(dev->d_kind.biosdisk.unit);
DEBUG("unit %d BIOS device %d", dev->d_kind.biosdisk.unit, biosdev);
if (biosdev == -1) /* not a BIOS device */
return(-1);
if (bd_opendisk(&od, dev) != 0) /* oops, not a viable device */
@ -602,9 +670,28 @@ bd_getdev(struct i386_devdesc *dev)
major = WDMAJOR;
}
}
return(MAKEBOOTDEV(major,
(dev->d_kind.biosdisk.slice + 1) >> 4, /* XXX slices may be wrong here */
(dev->d_kind.biosdisk.slice + 1) & 0xf,
biosdev & 0x7f, /* XXX allow/compute shift for da when wd present */
dev->d_kind.biosdisk.partition));
rootdev = MAKEBOOTDEV(major,
(dev->d_kind.biosdisk.slice + 1) >> 4, /* XXX slices may be wrong here */
(dev->d_kind.biosdisk.slice + 1) & 0xf,
biosdev & 0x7f, /* XXX allow/compute shift for da when wd present */
dev->d_kind.biosdisk.partition);
DEBUG("dev is 0x%x\n", rootdev);
return(rootdev);
}
/*
* Fix (dev) so that it refers to the 'real' disk/slice/partition that it implies.
*/
int
bd_fixupdev(struct i386_devdesc *dev)
{
struct open_disk *od;
/*
* Open the disk. This will fix up the slice and partition fields.
*/
if (bd_opendisk(&od, dev) != 0)
return(ENOENT);
bd_closedisk(od);
}

42
sys/boot/i386/libi386/bootinfo.c
View File

@ -23,7 +23,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: bootinfo.c,v 1.9 1998/10/07 02:39:05 msmith Exp $
* $Id: bootinfo.c,v 1.10 1998/10/07 10:55:46 peter Exp $
*/
#include <stand.h>
@ -155,21 +155,25 @@ bi_copyenv(vm_offset_t addr)
* MOD_SIZE sizeof(size_t) module size
* MOD_METADATA (variable) type-specific metadata
*/
#define MOD_STR(t, a, s) { \
u_int32_t ident = (t << 16) + strlen(s) + 1; \
i386_copyin(&ident, a, sizeof(ident)); \
a += sizeof(ident); \
i386_copyin(s, a, strlen(s) + 1); \
a += strlen(s) + 1; \
#define COPY32(v, a) { \
u_int32_t x = (v); \
i386_copyin(&x, a, sizeof(x)); \
a += sizeof(x); \
}
#define MOD_STR(t, a, s) { \
COPY32(t, a); \
COPY32(strlen(s) + 1, a); \
i386_copyin(s, a, strlen(s) + 1); \
a += strlen(s) + 1; \
}
#define MOD_NAME(a, s) MOD_STR(MODINFO_NAME, a, s)
#define MOD_TYPE(a, s) MOD_STR(MODINFO_TYPE, a, s)
#define MOD_VAR(t, a, s) { \
u_int32_t ident = (t << 16) + sizeof(s); \
i386_copyin(&ident, a, sizeof(ident)); \
a += sizeof(ident); \
COPY32(t, a); \
COPY32(sizeof(s), a); \
i386_copyin(&s, a, sizeof(s)); \
a += sizeof(s); \
}
@ -177,20 +181,16 @@ bi_copyenv(vm_offset_t addr)
#define MOD_ADDR(a, s) MOD_VAR(MODINFO_ADDR, a, s)
#define MOD_SIZE(a, s) MOD_VAR(MODINFO_SIZE, a, s)
#define MOD_METADATA(a, mm) { \
u_int32_t ident = ((MODINFO_METADATA | mm->md_type) << 16) + mm->md_size; \
i386_copyin(&ident, a, sizeof(ident)); \
a += sizeof(ident); \
i386_copyin(mm->md_data, a, mm->md_size); \
a += mm->md_size; \
#define MOD_METADATA(a, mm) { \
COPY32(MODINFO_METADATA | mm->md_type, a); \
COPY32(mm->md_size, a); \
i386_copyin(mm->md_data, a, mm->md_size); \
a += mm->md_size; \
}
#define MOD_END(a) { \
u_int32_t ident = 0; \
i386_copyin(&ident, a, sizeof(ident)); \
a += sizeof(ident); \
i386_copyin(&ident, a, sizeof(ident)); \
a += sizeof(ident); \
COPY32(MODINFO_END, a); \
COPY32(0, a); \
}
vm_offset_t

42
sys/boot/i386/libi386/bootinfo32.c
View File

@ -23,7 +23,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: bootinfo.c,v 1.9 1998/10/07 02:39:05 msmith Exp $
* $Id: bootinfo.c,v 1.10 1998/10/07 10:55:46 peter Exp $
*/
#include <stand.h>
@ -155,21 +155,25 @@ bi_copyenv(vm_offset_t addr)
* MOD_SIZE sizeof(size_t) module size
* MOD_METADATA (variable) type-specific metadata
*/
#define MOD_STR(t, a, s) { \
u_int32_t ident = (t << 16) + strlen(s) + 1; \
i386_copyin(&ident, a, sizeof(ident)); \
a += sizeof(ident); \
i386_copyin(s, a, strlen(s) + 1); \
a += strlen(s) + 1; \
#define COPY32(v, a) { \
u_int32_t x = (v); \
i386_copyin(&x, a, sizeof(x)); \
a += sizeof(x); \
}
#define MOD_STR(t, a, s) { \
COPY32(t, a); \
COPY32(strlen(s) + 1, a); \
i386_copyin(s, a, strlen(s) + 1); \
a += strlen(s) + 1; \
}
#define MOD_NAME(a, s) MOD_STR(MODINFO_NAME, a, s)
#define MOD_TYPE(a, s) MOD_STR(MODINFO_TYPE, a, s)
#define MOD_VAR(t, a, s) { \
u_int32_t ident = (t << 16) + sizeof(s); \
i386_copyin(&ident, a, sizeof(ident)); \
a += sizeof(ident); \
COPY32(t, a); \
COPY32(sizeof(s), a); \
i386_copyin(&s, a, sizeof(s)); \
a += sizeof(s); \
}
@ -177,20 +181,16 @@ bi_copyenv(vm_offset_t addr)
#define MOD_ADDR(a, s) MOD_VAR(MODINFO_ADDR, a, s)
#define MOD_SIZE(a, s) MOD_VAR(MODINFO_SIZE, a, s)
#define MOD_METADATA(a, mm) { \
u_int32_t ident = ((MODINFO_METADATA | mm->md_type) << 16) + mm->md_size; \
i386_copyin(&ident, a, sizeof(ident)); \
a += sizeof(ident); \
i386_copyin(mm->md_data, a, mm->md_size); \
a += mm->md_size; \
#define MOD_METADATA(a, mm) { \
COPY32(MODINFO_METADATA | mm->md_type, a); \
COPY32(mm->md_size, a); \
i386_copyin(mm->md_data, a, mm->md_size); \
a += mm->md_size; \
}
#define MOD_END(a) { \
u_int32_t ident = 0; \
i386_copyin(&ident, a, sizeof(ident)); \
a += sizeof(ident); \
i386_copyin(&ident, a, sizeof(ident)); \
a += sizeof(ident); \
COPY32(MODINFO_END, a); \
COPY32(0, a); \
}
vm_offset_t

42
sys/boot/i386/libi386/bootinfo64.c
View File

@ -23,7 +23,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: bootinfo.c,v 1.9 1998/10/07 02:39:05 msmith Exp $
* $Id: bootinfo.c,v 1.10 1998/10/07 10:55:46 peter Exp $
*/
#include <stand.h>
@ -155,21 +155,25 @@ bi_copyenv(vm_offset_t addr)
* MOD_SIZE sizeof(size_t) module size
* MOD_METADATA (variable) type-specific metadata
*/
#define MOD_STR(t, a, s) { \
u_int32_t ident = (t << 16) + strlen(s) + 1; \
i386_copyin(&ident, a, sizeof(ident)); \
a += sizeof(ident); \
i386_copyin(s, a, strlen(s) + 1); \
a += strlen(s) + 1; \
#define COPY32(v, a) { \
u_int32_t x = (v); \
i386_copyin(&x, a, sizeof(x)); \
a += sizeof(x); \
}
#define MOD_STR(t, a, s) { \
COPY32(t, a); \
COPY32(strlen(s) + 1, a); \
i386_copyin(s, a, strlen(s) + 1); \
a += strlen(s) + 1; \
}
#define MOD_NAME(a, s) MOD_STR(MODINFO_NAME, a, s)
#define MOD_TYPE(a, s) MOD_STR(MODINFO_TYPE, a, s)
#define MOD_VAR(t, a, s) { \
u_int32_t ident = (t << 16) + sizeof(s); \
i386_copyin(&ident, a, sizeof(ident)); \
a += sizeof(ident); \
COPY32(t, a); \
COPY32(sizeof(s), a); \
i386_copyin(&s, a, sizeof(s)); \
a += sizeof(s); \
}
@ -177,20 +181,16 @@ bi_copyenv(vm_offset_t addr)
#define MOD_ADDR(a, s) MOD_VAR(MODINFO_ADDR, a, s)
#define MOD_SIZE(a, s) MOD_VAR(MODINFO_SIZE, a, s)
#define MOD_METADATA(a, mm) { \
u_int32_t ident = ((MODINFO_METADATA | mm->md_type) << 16) + mm->md_size; \
i386_copyin(&ident, a, sizeof(ident)); \
a += sizeof(ident); \
i386_copyin(mm->md_data, a, mm->md_size); \
a += mm->md_size; \
#define MOD_METADATA(a, mm) { \
COPY32(MODINFO_METADATA | mm->md_type, a); \
COPY32(mm->md_size, a); \
i386_copyin(mm->md_data, a, mm->md_size); \
a += mm->md_size; \
}
#define MOD_END(a) { \
u_int32_t ident = 0; \
i386_copyin(&ident, a, sizeof(ident)); \
a += sizeof(ident); \
i386_copyin(&ident, a, sizeof(ident)); \
a += sizeof(ident); \
COPY32(MODINFO_END, a); \
COPY32(0, a); \
}
vm_offset_t

2
sys/boot/i386/libi386/i386_copy.c
View File

@ -11,7 +11,7 @@
#include "libi386.h"
#include "btxv86.h"
#define READIN_BUF 4096
#define READIN_BUF (16 * 1024)
int
i386_copyin(void *src, vm_offset_t dest, size_t len)